SEC Activist 13D/13G Monitor

Monitors SEC EDGAR for new Schedule 13D/13G filings by activist investors and — unlike generic EDGAR scrapers — flags brand-new campaigns: the first 13D an activist has ever filed on a given target company.

Default target: Saba Capital Management (CIK 1510281), the most active closed-end fund activist (~10 new campaigns per year). Works with any filer CIK: Bulldog Investors, Karpus, City of London, or any investor you want to track.

Why the new-campaign flag matters

A 13D filing stream is noisy: most filings are amendments or repeat filings on companies the activist already targeted. The actionable event is the first original 13D on a new target — that is when a campaign starts.

This actor computes the flag against the activist's complete filing history (not just the lookback window), using the same event definition as a published-style event study of 121 activist CEF campaigns (2015–2026): targets outperformed a closed-end fund basket by +2.65% after 63 trading days (t=4.3) and +3.6% after 126 days, with the discount closing in 81% of campaigns. Past performance does not guarantee future results — see the disclaimer below.

Input

Field	Default	Description
activistCiks	["1510281"]	Filer CIKs to monitor (Saba Capital by default). Find a CIK via EDGAR company search.
lookbackDays	45	Reporting window. The new-campaign flag always uses full history.
includeSchedule13G	false	Also report passive 13G stakes.
includeAmendments	false	Also report /A amendments (stake changes, exits).
onlyNewCampaigns	false	Emit only campaign-starting filings (ideal for alerts).
contactEmail	—	Included in the User-Agent per SEC fair-access policy. Recommended.

Output

One dataset item per (filing, target company):

{
  "activist_cik": 1510281,
  "activist_name": "Saba Capital Management, L.P.",
  "form": "SCHEDULE 13D",
  "filing_date": "2026-03-04",
  "acceptance_datetime": "2026-03-04T21:24:15.000Z",
  "accession": "0001062993-26-001289",
  "subject_cik": 748691,
  "subject_name": "KOREA FUND INC",
  "subject_ticker": "KF",
  "is_new_campaign": true,
  "filing_index_url": "https://www.sec.gov/Archives/edgar/data/1510281/000106299326001289/0001062993-26-001289-index.htm"
}

Typical setup: weekly alert

1. Schedule the actor to run weekly (activists file at ~10 campaigns/year — daily is overkill; SEC acceptance after market close means next-day granularity is enough).
2. Set onlyNewCampaigns: true.
3. Connect an Apify integration (email, Slack, webhook) on new dataset items.

The first run parses the activist's full filing history (~1–2 minutes for a prolific filer); subsequent runs reuse a persistent cache and finish in seconds.

Data source, fair access, and costs

All data comes directly from SEC EDGAR (public domain): the submissions API and filing index pages. The actor identifies itself via User-Agent and throttles below SEC's 10 req/s guideline. No third-party data, no scraping of commercial sites.

Disclaimer

This actor reports public regulatory filings and computed flags. It is not investment advice, and the historical statistics quoted above are research results, not a promise of future returns. Do your own research.